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PCI/ASPM: Use time constants

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Use defined constants to convert between time units.

Link: https://lore.kernel.org/r/20230915155752.84640-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ilpo Järvinen 2023-09-15 18:57:49 +03:00 committed by Bjorn Helgaas
parent 69bb38b774
commit e13b72b819
1 changed files with 8 additions and 6 deletions
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14
drivers/pci/pcie/aspm.c
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@ -21,6 +21,8 @@
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/time.h>
#include "../pci.h"
#ifdef MODULE_PARAM_PREFIX
@ -272,7 +274,7 @@ static u32 calc_l0s_latency(u32 lnkcap)
u32 encoding = FIELD_GET(PCI_EXP_LNKCAP_L0SEL, lnkcap);
if (encoding == 0x7)
return (5 * 1000); /* > 4us */
return 5 * NSEC_PER_USEC; /* > 4us */
return (64 << encoding);
}
@ -290,8 +292,8 @@ static u32 calc_l1_latency(u32 lnkcap)
u32 encoding = FIELD_GET(PCI_EXP_LNKCAP_L1EL, lnkcap);
if (encoding == 0x7)
return (65 * 1000); /* > 64us */
return (1000 << encoding);
return 65 * NSEC_PER_USEC; /* > 64us */
return NSEC_PER_USEC << encoding;
}
/* Convert L1 acceptable latency encoding to ns */
@ -299,7 +301,7 @@ static u32 calc_l1_acceptable(u32 encoding)
{
if (encoding == 0x7)
return U32_MAX;
return (1000 << encoding);
return NSEC_PER_USEC << encoding;
}
/* Convert L1SS T_pwr encoding to usec */
@ -327,7 +329,7 @@ static u32 calc_l12_pwron(struct pci_dev *pdev, u32 scale, u32 val)
*/
static void encode_l12_threshold(u32 threshold_us, u32 *scale, u32 *value)
{
u64 threshold_ns = (u64) threshold_us * 1000;
u64 threshold_ns = (u64)threshold_us * NSEC_PER_USEC;
/*
* LTR_L1.2_THRESHOLD_Value ("value") is a 10-bit field with max
@ -419,7 +421,7 @@ static void pcie_aspm_check_latency(struct pci_dev *endpoint)
if ((link->aspm_capable & ASPM_STATE_L1) &&
(latency + l1_switch_latency > acceptable_l1))
link->aspm_capable &= ~ASPM_STATE_L1;
l1_switch_latency += 1000;
l1_switch_latency += NSEC_PER_USEC;
link = link->parent;
}